New York Stock Exchange trading has restarted after being stopped for more than three and a half hours, according to a live report on CNBC.  Deals came to a halt after what is being called a technical glitch.

There is no word on what caused the problem Wednesday morning and President Barack Obama has been briefed on the developments.

It does not appear to be a cyber attack or hackers.

Marissa Arnold, a NYSE spokesperson said:

"We're currently experiencing a technical issue that we're working to resolve as quickly as possible. We will be providing further updates as soon as we can, and are doing our utmost to produce a swift resolution, communicate thoroughly and transparently, and ensure a timely and orderly market re-open"

But this may be one of the longest outages in recent years.

According to Bloomberg, all trading was stopped at 11:32 a.m.ET on the NYSE, but trading was going through NASDAQ, S&P 500, and Bats Global Markets.

CNN is reporting that a plan is in place when the market reopens to deal with trades that happened during the outage. But there was no word on exactly what that plan is.

An earlier glitch happened on the NYSE, but it was cleared before the 9:30 a.m. ET market opening, Market Watch reported.

Earlier Wednesday, United Airlines requested a ground stop from the FAA for its fleet due to a technical glitch also, but officials have not seen a link between the two outages.